Andropogon L.
  • Sp. Pl. 2: 1045. 1753. (1 May 1753)


Cite taxon page as 'WFO (2020): Andropogon L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000002006. Accessed on: 06 Jul 2020'

General Information

159. Andropogon L.

Por R.W. Pohl y G. Davidse.

Diectomis Kunth

Perennes o anuales, generalmente cespitosas, a veces cortamente rizomatosas. Tallos ramificados desde los nudos medios y superiores. Vainas carinadas o redondeadas; lígula una membrana, glabra o ciliolada; láminas lineares, aplanadas. Inflorescencia espatácea, generalmente un par de racimos, raramente un racimo solitario, a veces 3 o más racimos digitados, las inflorescencias terminales y axilares, a menudo agregadas en una falsa panícula compuesta; raquis articulado, las espiguillas pareadas, las 2 espiguillas y 1 entrenudo del raquis caedizos como una unidad; entrenudos del raquis y pedicelos filiformes a claviformes, a menudo algo aplanados, ciliados, cupuliformes en el ápice. Espiguillas dimorfas, comprimidas dorsalmente o lateralmente, sésiles y pediceladas, con 2 flósculos. Espiguillas sésiles bisexuales, lanceoladas, agudas, aristadas o sin aristas; callo obtuso; glumas subiguales, membranáceas a cartáceas, ocultando completamente a los flósculos; gluma inferior membranácea a coriácea, aplanada o cóncava, con 2 quillas submarginales, los márgenes inflexos sobre los márgenes de la gluma superior; gluma superior convexa o carinada, con o sin arista; flósculo inferior estéril; lema inferior hialina; pálea inferior ausente; flósculo superior bisexual; lema superior hialina, entera cuando no aristada, o aristada entre 2 lobos; pálea superior ausente; lodículas 2; estambres 1 o 3; estilos 2; fruto una cariopsis; hilo punteado. Espiguilla pedicelada rudimentaria y estéril a agrandada y estaminada, aristada o sin aristas; pedicelos libres. Aprox. 100 spp. Cosmopolita en climas cálidos y tropicales.

Bibliografía: Blake, S.T. Proc. Roy. Soc. Queensland 80: 55-84 (1969). Campbell, C.S. J. Arnold Arbor. 64: 171-254 (1983). Clayton, W.D. Kew Bull. 27: 457-474 (1972). Gould, F. Brittonia 19: 70-76 (1967).

  • Provided by: [C].Flora Mesoamericana
    • Source: [
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    • ]. 

    ANDROPOGON L.; Diectomis Kunth; Hypogynium Nees

    Por Richard W. Pohl y Gerrit Davidse

    Perennes o anuales, generalmente cespitosas, a veces cortamente rizomatosas; tallos ramificados desde los nudos medios y superiores; plantas polígamas. Vainas carinadas o redondeadas; lígula una membrana, glabra o ciliolada; láminas lineares, aplanadas. Inflorescencia espatácea, generalmente un par de racimos, raramente un racimo solitario, a veces 3 o más racimos digitados, las inflorescencias terminales y axilares, a menudo agregadas en una falsa panícula compuesta, raquis articulado, las espiguillas pareadas, las 2 espiguillas y 1 entrenudo del raquis caedizos como una unidad, entrenudos del raquis y pedicelos filiformes a claviformes, a menudo algo aplanados, ciliados, cupuliformes en el ápice; espiguillas dimorfas, comprimidas dorsalmente o lateralmente, sésiles y pediceladas, con 2 flósculos; espiguillas sésiles bisexuales, lanceoladas, agudas, aristadas o sin aristas, callo obtuso, glumas subiguales, membranáceas a cartáceas, ocultando completamente a los flósculos, gluma inferior membranácea a coriácea, aplanada o cóncava, con 2 quillas submarginales, los márgenes inflexos sobre los márgenes de la gluma superior, gluma superior convexa o carinada, con o sin arista, flósculo inferior estéril, lema inferior hialina, pálea inferior ausente, flósculo superior bisexual, lema superior hialina, entera cuando no aristada, o aristada entre 2 lobos, pálea superior ausente, lodículas 2, estambres 1 ó 3, estilos 2; espiguilla pedicelada rudimentaria y estéril a agrandada y estaminada, aristada o sin aristas, pedicelos libres. Fruto una cariopsis; hilo punteado.

    Género con ca 100 especies, cosmopolita en climas cálidos y tropicales; 9 especies en Nicaragua.

    F. Gould. The grass genus Andropogon in the United States. Brittonia 19: 70–76. 1967; S.T. Blake. Taxonomic and nomenclatural studies in the Gramineae, No. 1. Proc. Roy. Soc. Queensland 80: 55–84. 1969; W.D. Clayton. The awned genera of Andropogoneae. Studies in the Gramineae XXXI. Kew Bull. 27: 457–474. 1972; C.S. Campbell. Systematic of the Andropogon virginicus complex (Gramineae). J. Arnold Arbor. 64: 171–254. 1983.

  • Provided by: [F].Flora de Nicaragua
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    • 18
    • ]. 

    Spikelets arranged in pairs at each node of a disarticulating rachis, one sessile and perfect, the other pedicellate and staminate, neuter, or sterile, often very much reduced, the rachis and sterile pedicels sparsely to usually densely ciliate or villous; glumes of sessile spikelet indurate, the first flat or rounded on the back, several- nerved, the median nerve obscure or wanting, the margins keeled toward the summit; sterile lemma hyaline; fertile lemma hyaline, narrow, much shorter than the glumes, awnless or usually awned from the apex or from between minute lobes, the awns straight, or geniculate and twisted below; pedicellate spikelets as large as the sessile, or more or less reduced, sometimes only the pedicel present, the glumes not indurate.

  • Provided by: [J].Flora de Panama
    • Source: [
    • 19
    • ]. 

    Annual or perennial. Leaf blades linear, not aromatic; ligule scarious or reduced to a line of hairs. Inflorescence simple or compound; racemes fragile, usually paired, occasionally digitate or single, terminal on the culm or axillary and gathered into a spathate compound panicle; spikelets of a pair dissimilar; raceme bases not deflexed, without homogamous spikelets (present in A. munroi); rachis internodes filiform to linear or clavate, sometimes inflated, ciliate on margins. Sessile spikelet usually dorsally compressed; callus short, obtuse, shortly bearded, inserted into internode apex; lower glume membranous to leathery, 2-keeled, lanceolate, flat to concave with lateral keels, these sometimes narrowly winged, with or without intercarinal veins, or linear with dorsal keels and a deep veinless median groove; upper glume awned or awnless; lower floret reduced to a hyaline lemma; upper lemma hyaline, 2-lobed, awned from sinus; awn geniculate, column glabrous or puberulous. Stamens 1–3. Pedicelled spikelet variable, large to much reduced, male or barren. x = 10.

  • Provided by: [I].Flora Of CHina @ efloras.org
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    • 21
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    Hierbas cespitosas (en CR) a muy cortamente rizomatosas. Hojas con la vaina carinada a redondeada; lígulauna membrana, glabra a ciliolada; lámina linear, aplanada. Infl. espatácea, compuesta por varios racimos (raravez un racimo solitario), usualmente agregados en una falsa panícula compuesta, el raquis articulado. Espi-guillas pareadas, dimorfas, comprimidas dorsal o lateralmente, sésiles y pediceladas, las 2 espiguillas y un en-trenudo del raquis caedizos como una unidad; flósculos 2. Espiguillas sésiles bisexuales o (rara vez) femeninas,con o sin aristas; glumas subiguales, más largas que los flósculos, la inferior aplanada a cóncava, la superiorconvexa a carinada; flósculo inferior estéril, el superior bisexual; lemas hialinas; páleas ausentes. Espiguillaspediceladas rudimentarias y estériles a agrandadas y masculinas, aristadas o sin arista.

  • Provided by: [E].Manual de Plantas de Costa Rica
  • "Spikelets of 2 kinds, in pairs (or trios) at joints of the rachis, one sessile and perfect, the other(s) pediceled and either staminate, neuter, abortive, or completely suppressed; glumes of the fertile spikelet equal or subequal, coriaceous, flat to concave on the back, lacking a midvein; fertile spikelet with 2 narrow, hyaline lemmas shorter than the glumes, the lower one empty and awnless, the upper one fertile and usually with an evident terminal awn; palea reduced and hyaline, or wanting; perennial, usually tufted, often glaucous, with elongate lvs; spikelets in racemes or spikes, these solitary, paired, digitate, or panicled, in our spp. mostly long-villous, the common peduncle usually subtended and often partly enclosed by a spathe-like lf. 100, widespread, mostly in warm reg."

  • Provided by: [H].New York Botanical Garden
    • Source: [
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    Morphology

    Sessile spikelet dorsally or laterally compressed, narrowly ovate; callus often rounded; inferior glume with a ± deep median groove or ± flat on the back, muticous, mucronate or awned; superior glume usually keeled and flat or ± strongly convex on the back; inferior floret reduced to a hyaline lemma; superior floret bisexual, its lemma ± deeply bifid or entire, usually awned.

  • Provided by: [G].Plants Of the World Online Portal - FZ
    • Source: [
    • 15
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    Pedicelled spikelet male or sterile, sometimes vestigial, very rarely absent.

  • Provided by: [G].Plants Of the World Online Portal - FZ
    • Source: [
    • 15
    • ]. 

    Racemes usually in pairs, sometimes solitary, arranged in a spatheate false panicle or in several subdigitate groups, usually exserted from the spatheoles; peduncles usually longer than the racemes, rarely the same length, erect at maturity; internodes and pedicels ± filiform or clavate, usually long-ciliate on both margins, occasionally inflated and canaliculate; lowermost pair of spikelets in the inferior raceme homogamous or not obviously different from the others.

  • Provided by: [G].Plants Of the World Online Portal - FZ
    • Source: [
    • 15
    • ]. 

    Pedicelled spikelet ♂ or barren (occasionally suppressed), never concave on the back, usually awnless.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 16
    • ]. 

    Annuals or perennials, mostly robust

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 16
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    Caryopsis narrowly lanceolate to oblong, subterete to plano-convex

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 16
    • ]. 

    Leaf-blades linear, never aromatic; ligule membranous or reduced to a ciliate rim

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 16
    • ]. 

    Sessile spikelet dorsally compressed, or squeezed between pedicel and internode; callus obtuse, inserted in the concave top of the internode; lower glume membranous to coriaceous, mostly flat, concave or deeply grooved on the back, 2-keeled, the keels lateral or dorsal, with or without intercarinal nerves; upper glume awned or not; lower floret reduced to a hyaline lemma; upper lemma hyaline, often stipitiform, bilobed, passing between the teeth into a conspicuous awn with a glabrous or puberulous column

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 16
    • ]. 

    Inflorescence composed of paired or digitate (rarely solitary) racemes, terminal on the culm or axillary, in the latter case often numerous and crowded into a spathate false panicle; racemes very rarely deflexed at maturity, lacking homogamous pairs or these not conspicuously differentiated from the rest; internodes and pedicels filiform to obovoid, ciliate to plumose (rarely glabrous)

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 16
    • ]. 

    Included Species

      Bibliography

     Information From

    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • A Missouri Botanical Garden
    • B Missouri Botanical Garden
    Flora Mesoamericana
    http://www.mobot.org/MOBOT/fm/
    Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
    • C Missouri Botanical Garden
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • D
    Manual de Plantas de Costa Rica
    http://www.tropicos.org/Project/Costa%20Rica
    Hammel, B. E.; Grayum, M. H.; Herrera, C.; Zamora, N. Manual de Plantas de Costa Rica. Missouri Botanical Garden Press, 2003-2014
    • E Missouri Botanical Garden
    Flora de Nicaragua
    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • F Missouri Botanical Garden
    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • G
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • H Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • I Missouri Botanical Garden
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • J Missouri Botanical Garden
    Poaceae
    • K CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • L CC0 1.0 Universal (CC0 1.0).